here is a sim unlock that might work for us becuase it works on the T-Mobile S4.
How to SIM unlock Samsung Galaxy S4 SGH-M919 (tested - works)
I'm a long time lurker and benefited greatly from the postings here at xda.
So I'd ...
These are what I see
Sent from my SAMSUNG-SGH-I337 using xda premium
Thanks I got it!
I need to see the very first screen:
Ok for everyone here is the FULL SEQUENCE:
*#9090#->MENU->Back-> DM over UART()->MENU->Back->UMTS...
Can I use this method to downgrade from OTA 4.4.1 to OEM 4.3?
ERROR: Failed to access device. libusb error: -12